We do nothing but 2D work. Most of our parts look basically the same with different dimensions, so we work with tons of predrawn standards that are not to scale. We modify these standards on every new job and change the dimensions (not true dimensions, just lines with arrowheads inserted at each end with plain text added). Everything we do is in model space, e.g. line work, text, title block, ect. When we do draw a part that doesn't have a predrawn standard, then we will draw full size, with real dimensions, but still everything in model space.